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authorWANG Cong <xiyou.wangcong@gmail.com>2017-07-17 21:42:55 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-17 23:37:56 +0300
commitdf39a9f106d53532443a804352894480ca6ca5fd (patch)
treede50c6c9a402363e37350b62dc136a7818265397 /include/linux/bpf-cgroup.h
parent13c401f33e19c20431d9888a91d9ea82e5133bd9 (diff)
downloadlinux-df39a9f106d53532443a804352894480ca6ca5fd.tar.xz
bpf: check NULL for sk_to_full_sk() return value
When req->rsk_listener is NULL, sk_to_full_sk() returns NULL too, so we have to check its return value against NULL here. Fixes: 40304b2a1567 ("bpf: BPF support for sock_ops") Reported-by: David Ahern <dsahern@gmail.com> Tested-by: David Ahern <dsahern@gmail.com> Cc: Lawrence Brakmo <brakmo@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/bpf-cgroup.h')
-rw-r--r--include/linux/bpf-cgroup.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h
index 360c082e885c..d41d40ac3efd 100644
--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -85,7 +85,7 @@ int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
int __ret = 0; \
if (cgroup_bpf_enabled && (sock_ops)->sk) { \
typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk); \
- if (sk_fullsock(__sk)) \
+ if (__sk && sk_fullsock(__sk)) \
__ret = __cgroup_bpf_run_filter_sock_ops(__sk, \
sock_ops, \
BPF_CGROUP_SOCK_OPS); \